40403221 has 8 divisors (see below), whose sum is σ = 41543424. Its totient is φ = 39274800.

The previous prime is 40403201. The next prime is 40403243. The reversal of 40403221 is 12230404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40403221 - 2⁹ = 40402709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40403195 and 40403204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40403201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4251 + ... + 9943.

It is an arithmetic number, because the mean of its divisors is an integer number (5192928).

Almost surely, 2^40403221 is an apocalyptic number.

It is an amenable number.

40403221 is a deficient number, since it is larger than the sum of its proper divisors (1140203).

40403221 is a wasteful number, since it uses less digits than its factorization.

40403221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5891.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40403221 is about 6356.3528064449. The cubic root of 40403221 is about 343.1405131102.

Adding to 40403221 its reverse (12230404), we get a palindrome (52633625).

The spelling of 40403221 in words is "forty million, four hundred three thousand, two hundred twenty-one".